I tend to agree, seems very likely the electrician has made an error. Since around 2005 electricians doing domestic work have needed to provide minor works or installation certificates which are submitted to either the LABC or Scheme provider to get the completion certificate or compliance certificate depending on the route taken.Sounds like a 'Borrowed' neutral.
It is wrong. CGD branded stuff disappeared several years ago, it's all Lewden branded now.but this Seems wrong for a new consumer unit,
...Some photos... Include the meter, and the cables to and around the Consumer Unit(s) and the timer if separate.
.......An error may have been made by the plumber, but a competent electrician should be able to trace and rectify it.
How long did the electrician take, and what do you know about her qualifications? Which Competent Person Scheme is he a member of? Did they test the electrical installation before fitting the new Consumer Unit?
Assuming there IS a boost controller - there may not be one.Where do the immersion heater cables go?
There must be another box somewhere for boost control for the top heater, and probably terminals for the lower heater
Sounds like something could be messed up in there probably causing both immersion heaters to be fed from the overnight consumer unit
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